Sealing structure adapting to center distance adjustment of gearbox

Abstract

The utility model provides a sealing structure adaptive to center distance adjustment of a gearbox, an adjusting hole convenient for left-right adjustment of a roll shaft of a crushing roll is formed in the side wall of the gearbox, and the end part of the roll shaft extends out of the adjusting hole; the sealing structure covers the opening of the adjusting hole, and the area of the sealing structure is larger than the opening area of the adjusting hole; the sealing structure is provided with a preformed hole through which the end part of the roll shaft can pass conveniently; the sealing structure is detachably mounted on the side wall of the gear box; the installation angle / position of the sealing structure relative to the gearbox is adjustable. The sealing structure suitable for adjusting the center distance of the gearbox has the advantages that maintenance work can be simplified, the requirement for replacing parts due to adjustment of the center distance is avoided, better sealing performance is provided, and the overall efficiency and reliability of equipment are improved.

Description

Technical Field

[0001] The utility model belongs to the field of mechanical seal structures, and in particular relates to a seal structure adapted to adjust the center distance of a gearbox. Background Art

[0002] In the ore dressing and crushing industry, gear drive systems are widely used to adjust the center distance of crushing rolls to ensure the particle size requirements of raw materials and finished products. To adapt to the adjustability of the center distance, it is usually necessary to design a relatively large adjustment hole size in the gearbox so that the position of the shaft can be adjusted as needed. However, this design results in a relatively large gap between the shaft and the gearbox. The traditional solution is to fill these gaps with materials such as felt and cover them with a removable cover plate to seal these voids.

[0003] This traditional method has several disadvantages: First, when adjusting the center distance, the cover plate and filling material must be removed and reinstalled, which not only increases the maintenance workload but also causes production delays due to the need to customize a new cover plate to match the adjusted configuration. Second, due to the limitations of the filling material, this method cannot completely seal the gap, so the sealing performance is not ideal. Summary of the Utility Model

[0004] In view of this, the utility model aims to provide a seal structure adapted to adjust the center distance of a gearbox to solve at least one problem in the background art.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] A seal structure adapted to adjust the center distance of a gearbox, wherein an adjustment hole for the left and right adjustment of the roller shaft of the crushing roll is provided on the side wall of the gearbox, and the end of the roller shaft extends out from the adjustment hole;

[0007] The seal structure covers the opening of the adjustment hole, and the area of the seal structure is larger than the opening area of the adjustment hole;

[0008] A reserved hole for the end of the roller shaft to pass through is provided on the seal structure;

[0009] The seal structure is detachably installed on the side wall of the gearbox;

[0010] The installation angle / position of the seal structure relative to the gearbox is adjustable.

[0011] Furthermore, the circular reserved hole for the end of the roller shaft to pass through provided on the seal structure and the circular outer contour of the seal structure form an eccentric circle structure.

[0012] Furthermore, the gearbox includes a gearbox lower seat and a gearbox upper cover, and the gearbox upper cover is detachably installed on the gearbox lower seat.

[0013] Further, the central axis of the roller shaft lies on the horizontal plane where the splicing part of the lower seat and the upper cover of the gearbox is located.

[0014] Further, the sealing structure includes an upper eccentric gland and a lower eccentric gland, which are detachably connected to each other.

[0015] Further, a flat washer and / or a spring washer are arranged between the connecting parts of the upper eccentric gland and the lower eccentric gland, and the upper eccentric gland and the lower eccentric gland are connected by bolts and nuts.

[0016] Further, sealing grooves are formed on the sides of the upper eccentric gland and the lower eccentric gland facing the gearbox, and sealing felts are arranged in the sealing grooves for oil sealing.

[0017] Further, welding studs are arranged around the adjustment holes of the gearbox, and corresponding mounting holes are arranged at the edge parts of the sealing structure.

[0018] Compared with the prior art, the sealing structure for adapting to the center distance adjustment of the gearbox described in the present invention has the following beneficial effects:

[0019] The sealing structure for adapting to the center distance adjustment of the gearbox described in the present invention should be able to simplify the maintenance work, avoid the need to replace components due to the adjustment of the center distance, and provide better sealing performance to improve the overall efficiency and reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0021] Figure 1 is a schematic diagram of the sealing structure described in the embodiment of the present invention;

[0022] Figure 2 is a schematic diagram of the gearbox structure described in the embodiment of the present invention;

[0023] Figure 3 is a schematic diagram of the sealing gland in the first installation state described in the embodiment of the present invention;

[0024] Figure 4 is a schematic diagram of the sealing gland in the second installation state described in the embodiment of the present invention;

[0025] Figure 5 is a schematic top view of the gearbox described in the embodiment of the present invention;

[0026] Figure 6 is a schematic diagram of the oil seal part described in the embodiment of the present invention.

[0027] Description of the reference numerals:

[0028] 1 - Upper eccentric gland; 2 - Lower eccentric gland; 3 - Bolt; 4 - Nut; 5 - Flat washer; 6 - Spring washer; 7 - Oil seal; 8 - Felt; 9 - Upper cover of the gearbox; 10 - Lower seat of the gearbox; 11 - Gear; 12 - Roller shaft; 13 - Welded stud. Detailed implementation manners

[0029] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments may be combined with each other.

[0030] The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0031] To solve the above problems, the present patent provides a novel structure, which is simple in structure, easy to operate, and has strong adjustability. The technical solution it adopts is a structure adapted to adjust the center distance of the gearbox, including an upper eccentric gland 1, a lower eccentric gland 2, a bolt 3, a nut 4, a flat washer 5, a spring washer 6, an oil seal 7, and a felt 8.

[0032] Among them, the upper eccentric gland 1 and the lower eccentric gland 2 are connected by a bolt 3, and the oil seal 7 and the felt 8 are placed inside the eccentric gland for sealing.

[0033] As Figure 2 shown, the pitch circle where the welded stud 13 is located on the gearbox is eccentric, and the size of the eccentricity is set according to the adjustable amount of the two shafts. This figure is designed with an eccentricity of 20 mm, that is, the center of the pitch circle where the welded stud 13 is located is 20 mm away from the center of the hole through which the shaft of the gearbox passes. Before installing the gear 11, the oil seal 7 needs to be installed first, and then the gear 11 is installed. After the gear 11 is placed in the gearbox, the upper eccentric gland 1 and the lower eccentric gland 2 are installed, and the oil seal 7 and the felt 8 are also placed inside the eccentric gland. Then, the eccentric gland and the gearbox are fixed with nuts 4 respectively, and the upper eccentric gland 1 and the lower eccentric gland 2 are fixed with a bolt 3. At this time, the assembly is completed, as specifically shown in Figure 3 shown:

[0034] At this time, the center distance between the two shafts is 750. If the center distance between the two shafts needs to be adjusted, then the gearbox also needs to be adjusted accordingly and adjusted together with the shafts. For example, when the center distance between the two shafts needs to be adjusted to the maximum of 790, the eccentric gland needs to be removed first (remove the upper eccentric gland and the lower eccentric gland from the welding studs of the gearbox). After the roller shaft is adjusted to the corresponding position, by adjusting / rotating the placement angles of the upper eccentric gland 1 and the lower eccentric gland relative to the gearbox, it is ensured that the reserved holes on the upper eccentric gland 1 and the lower eccentric gland can allow the roller shaft to pass through. At this time, insert the mounting holes of the upper eccentric gland 1 and the lower eccentric gland onto the welding studs and then tighten the nuts to achieve fixation (at this time, the placement angles of the eccentric glands will change to a certain extent), so as to adapt to the adjusted position of the shaft, as Figure 4 shown:

[0035] At this time, the center distance between the two roller shafts is 790, the center distance between the two gears 11 is also 790, and the center distance between the two eccentric glands is 750, but the center distance of the holes in the middle is 790. In this way, the center distance can be adjusted together with the two shafts, making the whole structure more perfect and reasonable. While ensuring good sealing performance, it also has the function of adjusting the center distance, as Figure 3 and Figure 4 shown. When the distance between the two roller shafts 12 is 750, the sealing structure (i.e., the upper eccentric gland 1 and the lower eccentric gland 2) is vertically arranged, that is, the center of the circle in the side view of the sealing structure and the center of the circle of the roller shaft 12 are on the same vertical horizontal plane; when the distance between the two roller shafts 12 is 790, the sealing structure (i.e., the upper eccentric gland 1 and the lower eccentric gland 2) is horizontally arranged, that is, the center of the circle in the side view of the sealing structure and the center of the circle of the roller shaft 12 are on the same horizontal plane; when the distance between the two roller shafts 12 is between 750 and 790, rotate the installation angle of the sealing structure to ensure that the roller shaft 12 can pass through the reserved holes on the sealing structure;

[0036] It should be noted that the method for adjusting the distance between the crushing rollers in the gearbox and the related device can adopt the existing technology. The function of the sealing structure proposed in this solution to adapt to the center distance adjustment of the gearbox is: to block the gap of the adjustment hole opened on the side wall of the gearbox after adjusting the roller distance of the existing crushing rollers, so as to prevent the slag in the working process of the crushing rollers in the gearbox or the grease at the edge of the crushing rollers from leaking out through the adjustment hole.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

[0038] The above is only a preferred embodiment of the present invention, and it is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sealing structure adapted to the center distance adjustment of a gear box, characterized in that: The side wall of the gear box is provided with an adjustment hole for facilitating left and right adjustment of the roller shaft (12) of the crushing roller, and the end of the roller shaft (12) extends out of the adjustment hole; The sealing structure covers the opening of the adjustment hole; The sealing structure is provided with a reserved hole for the end of the roller shaft (12) to pass through; The sealing structure can be detachably mounted on the side wall of the gear box; The installation angle / position of the sealing structure relative to the gearbox is adjustable; The sealing structure comprises an upper eccentric gland (1) and a lower eccentric gland (2), and the upper eccentric gland (1) and the lower eccentric gland (2) are detachably connected; A flat washer (5) and / or a spring washer (6) is provided between the connection parts of the upper eccentric gland (1) and the lower eccentric gland (2), and the upper eccentric gland (1) and the lower eccentric gland (2) are connected via bolts (3) and nuts (4); The upper eccentric gland (1) and the lower eccentric gland (2) are provided with sealing grooves on one side facing the gear box, and sealing felt (8) is arranged in the sealing grooves for oil sealing (7).

2. A sealing structure adapted to adjusting the center distance of a gear box according to claim 1, characterized in that: The circular reserved hole opened on the sealing structure for facilitating the end of the roller shaft (12) to pass through and the circular outer contour of the sealing structure form an eccentric circle structure.

3. A sealing structure adapted to adjusting the center distance of a gear box according to claim 1, characterized in that: The gear box comprises a gear box lower seat (10) and a gear box upper cover (9), and the gear box upper cover (9) is detachably mounted on the gear box lower seat (10).

4. A sealing structure adapted to adjusting the center distance of a gear box according to claim 3, characterized in that: The central axis of the roller shaft (12) is located on a horizontal plane where the gear box lower seat (10) and the gear box upper cover (9) are spliced.

5. A sealing structure adapted to adjusting the center distance of a gear box according to claim 1, characterized in that: A welding stud (13) is arranged around the adjustment hole of the gear box, and a corresponding mounting hole is arranged at the edge of the sealing structure.

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